The story
- Proto-Indo-European*upó
- Proto-Italic*supo
- Latinsub
- Latinsub-
- Englishsub-
- Old Frenchnote
- Middle Englishnote
- Englishnote
- Proto-Indo-European*bʰeh₂ǵosder.?
- Proto-Indo-European*bʰeh₂g-der.?
- Proto-Germanic*bōks
- Proto-West Germanic*bōk
- Old Englishbōc
- Middle Englishbok
- Englishbook
- Englishnotebook
- English todaysubnotebook
Etymology from Wiktionary, CC BY-SA 4.0.